1995A&AS..111..259B

Query : 1995A&AS..111..259B

1995A&AS..111..259B - Astron. Astrophys., Suppl. Ser., 111, 259-264 (1995/June-1)

The long-term variability in active red dwarfs.

BONDAR' N.I.

Abstract (from CDS):

Photographic magnitudes of 29 red dwarf stars have been measured on time scales of 5-90 years using the archival plate collections of the Sternberg State Astronomical Institute (Russia), Astronomical Observatory of Odessa State University (Ukraine) and Sonneberg Observatory (Germany). Long-term changes in yearly mean magnitudes were detected or suspected for 10 objects. Two stars, V833 Tau and PZ Mon, showed remarkable amplitudes of variability up to 0.6mag and 1.0mag respectively. Eight stars have long-term changes in the range from 0.2 to 0.5mag. Variations of other programme stars were less than 0.2mag, which is comparable to the scatter in the mean light of check stars. Typical time scale of the long-term variability is 20-60years.

Abstract Copyright: ∼

Journal keyword(s): stars: activity - variable

Simbad objects: 31

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Number of rows : 31
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 Wolf 47 Er* 01 03 19.8350070578 +62 21 55.837228636   15.34 13.21 12.4   M5V 200 0
2 G 272-61B Er* 01 39 01.6377185550 -17 57 01.001240728           M6V 855 0
3 HD 283750 BY* 04 36 48.2421502608 +27 07 55.888214520   9.354   7.4   K2.5Ve 273 2
4 Ross 42 Er* 05 32 14.6565094848 +09 49 14.927561364 14.226 13.158 11.529 10.37 8.868 M4Ve 130 1
5 G 100-28 Er* 05 40 25.731120 +24 48 07.86312   16.74 14.94 14.71 11.04 M7V 71 0
6 HD 45088 BY* 06 26 10.2546417144 +18 45 24.761018520 8.402 7.74   6.2   K2Ve 241 0
7 Ross 614 Er* 06 29 23.3915175239 -02 48 48.803911021 13.942 12.764 11.071 9.77 8.05 M4.5V 349 0
8 V* PZ Mon RG* 06 48 21.0659534040 +01 13 08.309040528   10.18 9.60     K2III 46 0
9 V* YZ CMi Er* 07 44 40.1723046464 +03 33 08.875227574 13.761 12.831 11.225 9.958 8.263 M4.0Ve 885 0
10 G 51-15 Er* 08 29 49.3527921926 +26 46 33.624143059   16.87   14.736   M6.5Ve 295 0
11 V* CV Cnc SB* 08 31 37.422792 +19 23 49.28208   15.1 14.83 13.057   M4.0Ve 85 0
12 V* CU Cnc SB* 08 31 37.5741841080 +19 23 39.398029332   12.83 11.809 11.592   M5Ve 221 0
13 V* AD Leo Er* 10 19 36.2808181226 +19 52 12.010446571   10.82 9.52 9.19   dM3 1340 1
14 V* GL Vir Er* 12 18 59.3997287457 +11 07 33.773236317   15.68 13.90 13.55   M4.5Ve 168 0
15 Wolf 424 ** 12 33 17.361480 +09 01 15.79224 15.398 14.313 12.467 10.937 8.988 M5.5V 321 0
16 BD+36 2322 BY* 12 57 40.2569835641 +35 13 29.629213095   12.02 10.52 10.137   M0V+M4/5V 230 1
17 BD+13 2618 Er* 13 00 46.5566863405 +12 22 32.677229903 12.314 11.233 9.750 8.785 7.653 M0V 348 1
18 G 63-36 Er* 13 32 44.60871 +16 48 39.0197           M3.5Ve+M4Ve 50 0
19 HD 118100 Er* 13 34 43.2063495866 -08 20 31.338030204 11.578 10.552 9.372 8.602 7.930 K5Ve 346 0
20 Ross 867 Er* 17 19 52.9654155615 +26 30 02.667757724   14.67   12.649   M4.5V 119 0
21 Ross 868 Er* 17 19 54.2077697528 +26 30 03.068999297   12.98 11.336 11.060 8.420 M3.5V 161 0
22 V* BY Dra BY* 18 33 55.7720712062 +51 43 08.897780286 10.22 9.23   8.733   K4Ve+K7.5Ve 620 0
23 V* V816 Her Er* 18 42 44.9786088496 +13 54 16.727572582   14.8 12.86 11.58 9.95 M5V 63 0
24 CD-23 14742 Er* 18 49 49.3637762005 -23 50 10.447375350 13.528 12.19 10.43 10.23 7.703 M3.5Ve 378 0
25 MCC 188 SB* 18 55 27.4101872496 +08 24 09.030546324 12.858 11.737 10.194 9.09 7.69 M3Ve 198 0
26 Wolf 1130 Er* 20 05 02.1950576493 +54 26 03.234326252   11.970 13.883     sdM1 139 0
27 G 24-16 Er* 20 29 48.3179167836 +09 41 20.590506834       12.728   M4.5V 152 0
28 BD+40 883 SB* 21 00 05.3871460816 +40 04 12.650850610   11.59 9.97 9.63 7.96 M2.0V+M0.5V 179 0
29 HD 239960B Er* 22 27 59.7956021455 +57 41 49.746752678           M4V 172 0
30 V* HK Aqr BY* 23 08 19.5510173448 -15 24 35.766079704 13.4 12.282 10.872 9.964 9.019 M0Ve 211 0
31 BD-13 6464 ** 23 48 25.6952889480 -12 59 14.854646940   10.797 9.852 9.629   K5Vke 76 0

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